Carburetor



J. WHYTE CARBURETOR July 4, 1933.

Filed March 25. 1932 Mv//H/M gr x llilii l 49 well-known manner.

45 As previously stated, the fuel in thev chamber Patented July 4, 1933UNITED STATESl PgYWNTf4 .r-AMESWHYTE' or LYNwoon, oALiFoitNIA, A.

CARBURETOR Application med March 26, 1932. serial No. 601,355.

invention may appear from the accompany-v ing drawing, the subjoineddetailed description and the appended claims.

In the drawing Y Figure 1 is a side elevation of my carburetor asapplied to an engine.

Figure 2 is a longitudinal, sectional view of the same.

Figure 3 is a side elevation of the needle valve.

Referring more particularly to the drawing, my carburetor 1 consists ofa bowl2 which includes a central air passage 3 in which a venturi 4 isprovided. The venturi shoulders against the lower end of the bowl 2 andis held in position by a nut 5. An annular fuel chamber 6 surrounds theair passage 3 and fuel is fed to the chamber 6 through the pipe 7. Thelevel of the fuel in the chamber 6 is controlled through a float 8 whichactuates a needle valve 9 mounted at the juncture point of the pipe 7and the chamber 6. The float 8 is connected to the needle valve 9through the levers 10, and thus opens and closes the valve in the usualand A plurality of fuel intake ports 11 Lextend from the chamber 6through the venturi 4 and into the air passage 3. These ports arepositioned adjacent the top of the venturi.

6 is of relatively low gravity, and consequently, some pressure isrequired to force it through the ports 11 and into the air passage 3. Iprocure a pressure on the top of the fuel in the chamber 6 by means ofducts 12 which extend from the air passage 3 into the top of the chamber6. A hood 13 projects downwardly over each of the ducts within the airpassage 3, and the air traveling upwardly under a high velocity will becaught 55;

under these hoods and directed upwardly through the chiots 12 into thechamber 6, thus building up a pressure in the chamber to force the fuelout of the ports 11.

The fuel is heated in the chamber 6 by the .60.

hot exhaust gases from the engine, and these gases circulate around thechamber 6 in the annular hot air chamber 14. A pipe 15 rises from thebowl 2 and forms a continuation of the air passage 3. The pipe 15extends into 65 one end of the branch manifold 16. The pipe 15 is alsosurrounded by a heating chamber 17. The hot exhaust gases are conductedfrom the exhaust manifold 18 through a pipe 19, thence into a acket- 20which surrounds one side of the branch manifold 16 and the gases thenpass through ports 21, into the chambers 17 and 14. The cooled gasesfinally exhaust out of the ports 22.

When using low grade fuels the engine can 75 not be startedwithout theaidl of .a gasoline carburetor, and therefor, I have provided a gasolinecarburetor 23 on the opposite side of the branch manifold 16 from thecarburetor 1.

The engine starts on gasoline and as soon as 8,0

it is warmed the gasoline carburetor is shut ofl' and the fuel oilcarburetor is substituted.

Having described my invention, I claim: 1. A carburetor for low gravityfuels coinprising a branch manifold adapted to be se- 35 cured to theintake manifold of the engine, a gasoline carburetor on one end of saidbranch manifold, a low gravity fuel carburetor attached to the other endof thebranch manifold, a acket surrounding the branch mani- '.90

' means in the fuel chamber, needle valve means connected to the floatmeans, and means above the venturi in the air passage connected to thefuel chamber whereby pressure is exerted on the top of the fuel, andaplurality of fuel portsextending into said air passage.

2. A carburetor for low gravity fuels comprising a branch manifoldadapted to be secured to the intake manifold of the engine, a

gasoline carburetor on one end of said branch manifold, a low gravityfuel carburetor attached to the other end of the branch manifold, ajacket surrounding the branch manifold above the low gravity fuelcarburetor, a

l5 pipe extending from the exhaust manifold of needle valve meansconnected to the floatY means, and ducts extending from the air passageinto thefuel chamber, a hood over each duct, and fuel ports extendingfrom the fuel chamber into said air passage.

In testimony whereof, I aiiix my signature.

, Y JAMES WHYTE.

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